公开(公告)号：US10263697B2

公开(公告)日：2019-04-16

申请号：US15967267

申请日：2018-04-30

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zhaohui Li ,  Yuli Chen ,  Dawei Wang

IPC: H04B10/61 ,  H04B10/077 ,  H04B10/079 ,  H04B10/2513

Abstract: The present disclosure discloses a method and an apparatus for monitoring chromatic dispersion in an optical communications network. The method includes: performing coherent mixing of a to-be-monitored signal with a first optical signal and a second optical signal to obtain two analog electrical signals, where center frequencies of the first optical signal and the second optical signal are located on two sides of a center frequency of the to-be-monitored signal, and a difference between the center frequencies of these two optical signals equals a Baud rate; converting the two analog electrical signals into two corresponding first time domain power signals; determining a value of a time delay between these two time domain power signals; and obtaining, according to a correspondence between the value of the time delay and the chromatic dispersion, the fiber chromatic dispersion generated in a process of transmitting the to-be-monitored signal.

公开(公告)号：US20180248618A1

公开(公告)日：2018-08-30

申请号：US15967267

申请日：2018-04-30

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zhaohui Li ,  Yuli Chen ,  Dawei Wang

IPC: H04B10/079 ,  H04B10/2513 ,  H04J14/06

CPC classification number: H04B10/07951 ,  H04B10/0775 ,  H04B10/2513 ,  H04J14/06

Abstract: The present disclosure discloses a method and an apparatus for monitoring chromatic dispersion in an optical communications network. The method includes: performing coherent mixing of a to-be-monitored signal with a first optical signal and a second optical signal to obtain two analog electrical signals, where center frequencies of the first optical signal and the second optical signal are located on two sides of a center frequency of the to-be-monitored signal, and a difference between the center frequencies of these two optical signals equals a Baud rate; converting the two analog electrical signals into two corresponding first time domain power signals; determining a value of a time delay between these two time domain power signals; and obtaining, according to a correspondence between the value of the time delay and the chromatic dispersion, the fiber chromatic dispersion generated in a process of transmitting the to-be-monitored signal.